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Volume 38 Issue 3
Mar.  2014
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Research of vernier effect of ring resonator in sensor fields

  • Corresponding author: YAN Shubin, 897134887@qq.com
  • Received Date: 2013-11-04
    Accepted Date: 2013-11-08
  • To verify the vernier effect of fiber ring resonators, fiber ring resonators in different length were studied. The relationship between the transmission spectrum and the fiber ring resonator with the length of 2.24m, 2.52m was analyzed and compared, one resonant spectrum could be used as the ruler and the other as the vernier, when the resonant frequency was the same and the number difference of free spectral range (FSR) was only one. Based on the difference aliquot measuring principle and by dividing FSR of the ruler into nine parts,the minimum measurement accuracy of the vernier was 0.01GHz which was consistent with MATLAB theoretical simulation result. Theory and experiments show that the accuracy can be improved by changing the size of the resonant cavity to increase the aliquot number of FSR difference. The vernier effect of resonator is expected to be potentially applied in the field of high-sensitivity sensor because of the sensitivity of the micro-cavity to the change of external environment.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Research of vernier effect of ring resonator in sensor fields

    Corresponding author: YAN Shubin, 897134887@qq.com
  • 1. Key Laboratory of Instrumentation Science and Dynamic Measurement(Ministry of Education), North University of China, Taiyuan 030051, China

Abstract: To verify the vernier effect of fiber ring resonators, fiber ring resonators in different length were studied. The relationship between the transmission spectrum and the fiber ring resonator with the length of 2.24m, 2.52m was analyzed and compared, one resonant spectrum could be used as the ruler and the other as the vernier, when the resonant frequency was the same and the number difference of free spectral range (FSR) was only one. Based on the difference aliquot measuring principle and by dividing FSR of the ruler into nine parts,the minimum measurement accuracy of the vernier was 0.01GHz which was consistent with MATLAB theoretical simulation result. Theory and experiments show that the accuracy can be improved by changing the size of the resonant cavity to increase the aliquot number of FSR difference. The vernier effect of resonator is expected to be potentially applied in the field of high-sensitivity sensor because of the sensitivity of the micro-cavity to the change of external environment.

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